. Annual report 1919. regularly used. These include such productsas transformer oil, rubber gloves, etc. (d) Standardization and calibration of electrical measuring instruments. 1C20 HYDRO-ELECTRIC POWER COMMISSION 273 Special tests include those for which no standardized method of procedure hasbeen developed. These ultimately become routine tests as accumulated experiencein testing any product results in standard methods of conducting the same. Amongsuch may be mentioned tests on lubricating oil, paint, gasoline, insulating varnishesand tapes. Many special tests are also made at the instance
. Annual report 1919. regularly used. These include such productsas transformer oil, rubber gloves, etc. (d) Standardization and calibration of electrical measuring instruments. 1C20 HYDRO-ELECTRIC POWER COMMISSION 273 Special tests include those for which no standardized method of procedure hasbeen developed. These ultimately become routine tests as accumulated experiencein testing any product results in standard methods of conducting the same. Amongsuch may be mentioned tests on lubricating oil, paint, gasoline, insulating varnishesand tapes. Many special tests are also made at the instance of other departmentsto enable them to fix practice in field construction. For example tests were recentlymade of the dielectric strength of various thicknesses of insulating tapes whenapplied to high tension conductors, to enable the engineering department to draftrules governing the insulation of conductors in exposed positions in tests are also made on defective apparatus sent in by Laboratory Switchboard Room, showing main switchboard and 60-Cycle,Motor-Generator Set. The approval testing is described in detail below. Fully fifty per cent, of the work of the Laboratories may be designated asresearch. This work originates either in the Laboratories as the result of sug-gestions by individual members of the staff, or in other departments as a resultof their needs. The investigations undertaken range from comparatively shortstudies to extended researches occupying the time of several men. Particular sub-jects now under investigation are referred to more fully below. Additions to the equipment have been made as they became necessary andplans are now under consideration for additions to the building to provide adequateaccommodation for those sections which are now handicapped for lack of space. 19 H. (i) 274 TWELFTH ANNUAL REPORT OF THE No. 49 High-Tension and Electrical Testing Laboratory Previous reports have outlined the general activities of
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